说明：  与日常生活中的大多数事务一样，设计一个嵌入式产品的过程也必须从确定目标开始，对生产的产品进行明确定义。对产品进行定义主要是对产品是什么和能有什么功能进行描述，其次是在我们的整个开发过程中，应该要撰写一些开发文档
(With most matters of daily life, like an embedded product design process must also start from the target, the production of the product clearly defined. Definition of the product is mainly the product is and what functions can be described, followed by our entire development process, a number of development documents should be written)